Register your phone numbers with the national do not call registry.
https://www.donotcall.gov/default.aspx
If you are already on the registry and getting telemarketer calls still, you can file a complaint with the registry
https://www.donotcall.gov/Complain/ComplainCheck.aspx
You need to get the company name, the phone number if possible and as much info as you can about the caller and time and date of the call.
The fine is up to 10,000 for each infraction.